Chapter 5: The Base and Some Painting
Step 5.1. Making the base
The base is simply a square frame with a rebate cut around the inside edge in which the plywood floor sits.
I cut four pieces of 2½" x 3½" (90mm x 95mm) wood to the length of 40" (1000mm).
I marked along the narrow face of each piece 1¼" (31mm) in, and along the adjacent face 11/16" (18mm) down (the thickness of the plywood floor).
I set the blade depth on the circular saw to the appropriate depth and cut along the marks creating a rebate 1¼" (31mm) in and 11/16" (18mm) deep.
I cut a 45 degree miter (angle cut) each end of each piece across the narrow face of the wood angling in towards the rebate.
I made the cuts so that the length between the longest points of the rebates was 36¼" (906mm).
I fixed the four pieces together to make a square.
I rounded all the corners with a disc sander.
And finally (as far as construction went) I added a piece of wood (blocking) across the middle. The purpose of that was to take any bounce or spring out of the plywood floor.